Sock



FIG. 1 is a front, right side perspective view of a sock in accordance with my new design;

FIG. 2 is a front, right side perspective view of the sock in an in-use configuration, with the toes and lower leg of a user illustrated in broken lines;

FIG. 3 is a front elevational view of the sock;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a left side elevational view thereof; and,

FIG. 8 is a right side elevational view thereof.

The broken lines in the figures are for the purpose of showing environmental structure and form no part of the claimed design. 

CLAIM The ornamental design for a sock, as shown and described. 